Benjamin f



Patented Apr. 4, I899.

B. F. JACKSON.

6 A S B U R N E R.

(Application filed Sept. 29, 1898.)

(No Model.)

ffwezzibr: I E

h lCEt BENJAMIN F. JACKSON, OF CAMBRIDGE, MASSACHUSETTS, ASSIGNOR 'llOROBERT HOE, THEODORE H. MEAD, AND CHARLES W. CARPENTER, OF

NEW YORK, N. Y.

GAS-BURNER.

SPECIFICATION forming part of Letters Patent NO. 622,482, dated April 4,1899.

Appli tion fi ed September 29, 1898- Serial No. 692,190- (No model.)

new an d useful Improvements in Gas-B urners,

of which the following is a specification.-

This invention relates to an improvement in burners for consuming mixedair and gas,

and is more particularly applicable to that class of burners in whichair is fed under pressure to the gas with which it is mixed.

One form of gas-burner to which air under pressure is supplied consistsof a chamber for the air and a second chamber for the gas, theair-chamber having a series of orifices and the gas-chamber having aseries of tubes which pass through the air-chamber and the mouths ofwhich lie in the orifices of the airchamber. The air under pressureissues from the orifices around the mouths of the tubes, being mixedwith the gas at that point. In burners of this form it has been usual tosupply the air under pressure to the air-chamber at some point,usuallyat the side, so that the air would be unequally distributed amongthe several burner-tubes. The result of thus supplying the air is thatthose of the burner-tubes which receive the most air maintain a muchstronger combustion than the other burnertubes. They therefore burn outmuch quicker,

and at the same time the burner as a whole is less efficient not onlybecause some of its parts burn out before others, but also because itdoes not deliver an equal amount of heat to all parts of the object towhich its heat is to be imparted. The same is also true in a greater orless degree of burners employing a single gas-tube which passes throughan air-chamber to which air is supplied under pressure. In suchconstructions, however, the different parts of the burner will receivedifferent amounts of air, and different degrees of combustion will beaccordingly maintained at different parts of the burner-tube, so thatthe burner as a whole does not deliver an even degree of heat.

It is the object of this invention to produce a burner to which air issupplied under pressure and in which all parts of the burnertube, orincase there is a plurality of burnertubes each burner-tube, get the sameamount of air and consequently maintains an even combustion, therebyproducing a more efficient burner and one having a longer life.

The invention consists in certain parts, improvements, and combinationsto be hereinafter described,and more particularly pointed out in theclaims hereunto appended.

In the accompanying drawings, which form a part of this specificationandin which like letters and numerals of reference indicate the sameparts, Figure 1 is a vertical sectional elevation of a burner embodyingthe invention, and Fig. 2 is a plan view of the same.

The burner which has been selected to illustrate the invention consistsof a casting A,

having a web 10, which separates the casting into two superposedchambers 1 and 2. The chamber 1 is annular in form, and its inner wallsform a tube 3, which-is preferably centrally located. The casting isshown as having a downwardly-depending flange A, which rests upon ashoulder 5, formed upon a pipe 6, which pipe supplies air under pressureto the burner. The burner may, however, obviously be supported in anysuitable way.

Thechamber 2 is the air-chamber, and the air from the pipe 6 passes intoit through the tube 3.

The chamber 1 is the gas-receiving chamber, the gas being fed theretofrom a pipe 7, which is connected to the chamber in any suitable way, asby a union 8, which is threaded into a perforation in the side of thechamber. The gas is fed out of the chamber 1 through short burner-tubes9, which are preferably screw-threaded into the web 10, which separatesthe chambers 1 and 2. These burnertubes pass through the chamber 2 andhave their upper ends located in orifices 11 of the top wall of thischamber. These orifices are larger in diameter than the diameter of theburner-tubes, a space being thus left around the burnentubes, throughwhich the air from the chamber 2 is forced, the air being mixed with thegas as it issues from the burner-tubes.

It will be seen that by admitting the air under pressure into thechamber 2in the manner described it will first impinge against the topof the chamber 2 and then flow laterally and air under pressure aresupplied, of aand evenly in all directions toward the burnertubes 9 andout through the orifices in the top in which the burner-tubes arelocated. It is apparent that the air will be distributed equally to allthe burner-tubes, the result being that an even combustion is attainedat each of the burner-tubes. The burner as a wholeis con sequently muchmore efficient in its action and has a much longer life than would bethe case if the air were distributed unequally to the burner-tubes,which would be the result if the air under pressure were forced in atthe side, for instance, of the chamber. In that case the burner-tubes inthe direct line of the air-current would receive more air than thoselying on each side of it, with the result that much stronger combustionwould be maintained at those tubes than at others.

Whilethe burner is shown as circular in form, it is of course obviousthat it maybe of any shape desired and that the air might be admitted inother ways than at the bottom, the essential idea of the invention beingto so admit the air under pressure to the air-chamber as to bedistributed equally among the several burners. It is also obvious thatthe burner may be provided with as many or as few burner-tubes asdesired.

WVhat I claim is 1. The combination in a burner to which gas and airunder pressure are supplied, of an air-chamber having a plurality ofapertures in its top, a plurality of burner-tubes one for each aperture,each tube having its orifice closely adjacent to said aperture, andmeans for delivering air under pressure to the chamber so that an equalamount of air shall be supplied to each aperture, substantially asdescribed.

2. The combination in a burner to which gas chamber having a pluralityof apertures in its top and a plurality of burner-tubes one for eachaperture, the orifices of the tubes being closely adjacentto theapertures, the chamber having an opening in its bottom through which airunder pressure is admitted the opening being so located that the air isdistributed equally among the apertures, substantiallyas described.

3. The combination in a burner to which gas and air under pressure aresupplied, of an airchamber having a'plurality of apertures arrangedsubstantially in a circle, a plurality of burner-tubes one for eachaperture, said tubes having their orifices closely adjacent to theapertures, and a chamber having an opening in its bottom through whichthe air under pressure is admitted to the chamber, the said openingbeing at a substantially equal distance from each of the apertures,substantially as described.

4. The combination in a burner to which gas and air under pressure aresupplied, of a gaschamber, a superposed air-chamber having a pluralityof apertures, a plurality of burnertubes leading from the gas-chamberthrough the air-chamber and having their orifices closely adjacent tothe apertures, an opening in the bottom of the air-chamber, said openingbeing so located that the air is equally distributed to the saidapertures, and an airinlet tube connecting with the opening in theair-chamber, substantially as described.

5. The combination in a burner to which gas and air under pressure aresupplied, of a gaschamber, a superposed air-chamber having a pluralityof apertures, a'plurality of burnertubes leading from the gas-chamberthrough the air-chamber and having their orifices closely adjacent tothe apertures, an opening in the bottom of the air-chamber, said openingbeing at a substantially equal radial distance from each of theapertures, and an airinlet tube connecting with the opening in theair-chamber, substantially as described.

6. Agas-burner formed from a casting having a series of orifices in itswall, and an internal web which separates the casting into twosuperposed chambers for air and gas respectively, the gas-chamber beingprovided with a gas-inlet opening and its inner wall forming anair-inlet tube, the Web having a large aperture which forms the mouthofthe air-inlet tube, and a series of small apertures and a series of burner-tubes, each having one end secured in the apertures in the web andhaving the opposite end lying in one of the orifices in the wall ofcasting, substantially as described.

In testimony whereof I have affixed my signature in presence of .twowitnesses.

BENJAMIN F. JACKSON. Witnesses:

C. F. BROWN, M. B.- PHILIPP.

